The blue birds stamp I think introguing: are they doves, or crows, or other birds. And sorry, I can't help to see a molar in the figure between them, I would love to send it to Christophe Blaise, the mail art dentist in France...

I think they are not supposed to be any specific bird, but they do remind me more of doves on the orange and purple stamps, and a crow on the fuchsia stamp. There is a stamp in this set with hummingbirds on that Eva showed on her blog.